Apparatus for casting bodies of ceramic mass.



C. ECKSTEIN. APPARATUS FOR CASTING BODIES 0F CERAMIC MASS. APPLICATION FILED mm. 1915.

1,163,328, Patented Dec. 7, 1915.

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Mr/4%; U linnmumaunmxifi :5! i) I I I \b pNrrED sTA'rEs PATENT OFFICE I CHRISTIAN ECKSTEIN, OF WZEIDEN, GERMANY, ASSIGNOR TO AKTIENGESEILSGHAFT PORZELLANFABRIK WEIDEN, GEBRT J 'DER BAUSCHER, F WEIDEN, IBAVARIA, GER- MANY.

APPARATUS FOR CASTING BODIES-OI CERAMIC MASS.

. Patented Dee. 7,1915.

Application filed August 4 1915. Serial No. 43,576.

' To all whom it may concern:

for casting thick-walled hollow bodies or solid bodies of various especially ceramic masses and comprises also an apparatus for carrying out the improved casting method.

Now, this invention consists in that immediately the molds which are open at the bottom only, are filled, the casting mass is pressed in from below with an overpressure. This procedure does not only warrant a very quick, simple and safe manufacture of the said bodies, but also allows the simultaneous casting-of any desired number of articles of any desired size and shape.

In order to render the present invention more easily intelligiblereference is had to the accompanying drawing which illustrates an apparatus for carrying the casting method into effect. v

Figure 1 is a plan and Fig. 2 a cross section on line AB of Fig. 1.

As maybe seen from the drawing the apparatus consists of a-horizontally arranged receptacle 6, for instance, a tube, which may be provided with vertically upwardly extending pipe sockets c, which are distanced one from another so as to correspond to the molds to be employed and may be arranged in any desired number. The said pipe sockets extend through corresponding borings of a plate a, and are on their top ends provided with broad flanges d. On their outer ends the plate (1 possesses carriers 71, which are screw threaded and support a second plate f, which is parallel to the plate a and may be adjusted in relation to the same by means of nuts 2". In coincidence with the axis of .each of the pipes c thread-boxes g ing each at their bottoms, which openings coincide with the mouths of the pipes 0. By means of the adjustable plate f the molds 6 may be fastly pressed upon the flanges 03. By means of the screw spindles it any 'desired mold of the series may individually and independently of the others of the series pressed more or less intensively toward the plate a.

The flanges d are preferably provided with a packing plate of rubber orthe like and likewise the top part of each mold is covered with a. metaldisk k against which the screw spindle I1. presses in order to prevent the mold from becoming damaged by the pressure. V

At a level somewhat higher than the mold frame work a, f, 11 there is arranged a receptacle t, containingthe molding mass. A conduit m, it into which a cut-ofi valve n is arranged leads from the receptacle t to the tube like receptacle 1). The conduit u possesses an outlet valve 8 near the receptacle b. Another conduit 79, provided with the cut-off valve 1',

leads from the receptacle t to the conduit u.

In the last mentioned branch conduit there is arranged a pressure generating device,-

such, for instance, as a hand=pump o, by means of which the molding mass may be forced under pressure into the receptacle a: and from there to the conduit w. On the front side of the receptacle 6 there is arranged an outlet cock 1) and on its rear side a detachable cover so that the receptacle may be cleaned as soon as it getsclogge'd.

The methodfor manufacturing cast bodies by means of the device above described is as follows :As soon as the molds are, either by theplate 7 or by the spindles h, fastly pressed against the pipe sockets 0,,

so that both parts are lying tightly against each other, the molding mass, such, for mstance, as slip is fed from the receptacle t, after having closed the cock 7' and opened the, cock 11., through the conduits m, 'u to the mold a with the natural pressure of gravitation. As soon as the molds c are filled upthe valve 01. is closed and consequently the conduit m blocked. Now the valve '1' is the pressure of the pump being maintained upon a height, which depends on the circumstances present. Owing to the considerable pressure the liquid of the molding mass, mostly water, is at first forced 1nto the molds and then pressed through the same. To enable this the molds have a sultable structure; they are, for instance, porous.

By removing the water, from the casting mass in the molds, the molding mass gets gradually densified and forms the socalled body. As soon as the bodies to be cast possess the proper strength of body, the pump 0 is cut-0H again, the, valve 2 is closed and in turn the conduits p, u are cut-off, whereupon the superfluous molding mass in the molds i. 6. so much as is necessary for freeing the molds from superfluous mass (slip), is allowed to flow off through the outlet valves, without necessitating the molds to be-moved out of their stationary position.

v series of borings, a series of pipe sockets ex Assoon as this is performed, the molds may be removed from the frame work and emptied. c I

- The receptacle I), being arranged transversely asregards the molds, holds a considerable quantity of molding mass so that 1. In an apparatus for casting bodies of ceramlc mass, such, for mstance, as porce-' a' certain uniform pressure may be upheld in the molds for a longer time, which is necessary when manufacturing such bodies, especially ceramic ones.

I claim as my invention lain mass thecombination of a horizontal tube like receptacle, a plate, arranged over the said horizontal receptacle and having a tending upwardlyfrom the said horizontal receptacle and through the borings in the said plate, another plate, adjustable-in relation to the first mentioned plate and having a series of thread boxes, a series of screw spindles in thesaid thread boxes, a series of molds arranged between the two plates coaxially with the said pipe sockets, means for feeding themolding mass to the said horizontal receptacle and means for generating an overpressure in the said horizontal receptacle, substantially. as described.

2. In an apparatus for casting bodies of ceramicmass, such, for instance, as porcelaln mass the combm'atlon of a horizontal tube l1ke receptacle, a plate, arranged over the said horizontal receptacle and having a series of borings, a series of pipe sockets extending upwardly from the said horizontal receptacle and through the borings in the said plate, another plate, adjustable in relation to the first mentioned plate and having a series of thread boxes, a series of screw spindles in the said thread boxes,-a series of molds arranged between the two plates coaxially with the said pipe sockets, a receptacle, located at a level higher than that of the horizontal receptacle, a main conduit,

leading from the higher receptacle to the horizontal receptacle, cut off valves in the said conduit, an auxiliary conduit, a cut off valve in the auxiliary conduit, a pump and another receptacle, communicating with the main conduit, means for allowing the horizontal receptacle to be cleaned, substantially as described.

Y 3. In an apparatus of the kind ,as' specified, the combination of a highly positioned receptacle containing the molding mass, a-

'deeply positioned horizontal receptacle, a

frame work, consisting of two plates .adjustable against each other, a series of molds, open .at the bottom and arranged within the said frame work, means for feeding molding mass to the horizontal receptacle, means forfeeding the molding mass from the horizontal receptacle to the molds from below under the natural pressure of gravi- In testimony whereof I affix my signature in the presence of two witnesses.

- v CHRISTIAN ECKSTEIN. Witnesses:

OscAR BocK,

L. K. WINANS. 

